Which of the following occurs during endochondral ossification?
A) Osteoblasts secrete the organic component of the matrix.
B) The bone grows in length.
C) Blood vessels enter the spaces between bone spicules to supply the growing tissues.
D) Osteoblasts differentiate within a mesenchymal or fibrous connective tissue.
E) None of the answers are correct.
B) The bone grows in length.
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Someone with the genotype associated with hereditary pancreatitis might not show symptoms of the disorder because the disorder does not have a _________ level of 100%
A. dominance B. penetrance C. polygenicity D. homozygous E. sex-linkage
Which two glands are especially noted for regressing after childhood?
A. The anterior and posterior pituitary B. The thymus and pineal gland C. The thymus and adrenal medulla D. The thyroid and parathryroids E. The thymus and thyroid
Which substances can diffuse across a typical dialysis membrane?
a. water b. protein c. glycogen d. ion e. glucose
The respiratory centers are located in the ________.
A. midbrain and medulla oblogata B. hypothalamus and medulla oblongata C. hypothalamus and pons D. pons and medulla oblongata